💬 In plain words: Pagination breaks massive lists of Salesforce records into smaller, clickable pages (like Page 1, 2, 3). By combining Salesforce's built-in StandardSetController (which handles the math for "Next" and "Previous" pages) with a custom Wrapper Class , you can display these smaller lists while letting users check boxes next to rows to perform bulk actions. Displaying hundreds or thousands of records on a single page causes slow load times, high memory consumption, and a terrible user experience. Furthermore, standard Salesforce sObjects (like Account ) do not have a built-in "isSelected" checkbox field for the UI. To solve both problems simultaneously, we pair the ApexPages.StandardSetController with a custom Apex Wrapper Class.
Apex Development